Distinguish between the following on the basis of what is given within the brackets:
Phototropism and geotropism (direction of movement).

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Solution

Phototropism
It is a growth-dependent movement of plants towards sunlight.
Geotropism
It is also a growth-dependent movement of plants towards gravity.
Photo-tropism Geotropism
It is a directional movement, drawn by the sunlight acting as a stimulus. It is a directional movement, drawn when gravity acting as the stimulus.
Shoot part of trees are usually positively photo-tropic and roots are negatively geotropic. Roots of plants are positively geo-tropic and shoots are negatively geotropic.

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Photo-tropism	Geotropism
It is a directional movement, drawn by the sunlight acting as a stimulus.	It is a directional movement, drawn when gravity acting as the stimulus.
Shoot part of trees are usually positively photo-tropic and roots are negatively geotropic.	Roots of plants are positively geo-tropic and shoots are negatively geotropic.